<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>请命名~</title>
	</head>
	<body>
		<a href="www.baidu.com">...</a>
		<!-- <script> -->
			<!-- var a = 1; -->
			<!-- var time = setInterval(function() { -->
				<!-- console.log("~~~~123~~", a++) -->
			<!-- }, 1000) -->
			<!-- // clearInterval(time) -->
		<!-- </script> -->
		
		
		<script>
			function fun(n, o){
				console.log(o);
				return {
					fun: function(m){
						return fun(m, n);
					}
				}
			}
			var a = fun(0);
			a.fun(1);
			a.fun(2);
			a.fun(3);
			// ------
			var b = fun(0).fun(1).fun(2).fun(3);
			// ------
			var c = fun(0).fun(1);
			c.fun(2);
			c.fun(3);
		</script>
	</body>
</html>
